Image-forming mechanism.



No. 636,063. Patented Oct. 3|, I899. F. H. RICHARDS.

IMAGE FORMING MECHANISM.

(Application filed Oct 26, 1898. (-No Model.) 6 Sheets-Shae l.

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9 9 B M c 0 d e t n e t a P S D R A H m D H F 3 6 7 6 .3 6 0 N IMAGEFORMING MECHANISM.

(Application filed Oct. 26, 1898.)

6 Sheets-Sheet 2 (N0 Mudei.)

Invenflu:

No. 636,063. Patented Oct. 3|, I899. F. H. RICHARDS.

IMAGE FORMING MECHANISM.

(Application filed Oct. 26, 1898.)

6 Sheets-$heet 3 N0 Model.)

h E 0mm Wlln asses.

No. 636,063. Patented Oct. 3|, I899. F. H. RICHARDS.

IMAGE FORMING MECHANISM.

(Application flled Oct. 26, 1898,)

6 Sheets-Sheet 4,

fiNo Model.)

In D821 01".

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Patented 06:. 3|, I899.

F. H. mcmuws. IMAGE FORMING MECHANISM.

(Application filed Oct. 26, 1898.)

6 SheetsSheet 5 N0 Model.)

In 11 en 01: M 1 l I Witnesses. Wa/WX Q No. 636,063. Patented Oct. 31,I899. F. H. RICHARDS.

IMAGE FORMING MECHANISM.

(Application filed Oct. 28, 1898.)

(No Model.) 6 Sheets-Sheet 5,

Invenfof.

UNITED STATE? PATENT FFIGEe FRANCIS H. RICHARDS, OF HARTFORD,CONNECTICUT.

IMAGE-FORMING MECHANISM,

SPECIFICATION forming part of Letters Patent No. 686,063, dated October31, 1899. Application filed October 26, 1898. Serial No. 694,581. (Nomodel.)

To all whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inImage-FormingMechanism, of which the following is a specification.

This invention relates to imageforming mechanism, and more particularlyto photoprinting mechanism for projecting images onto a suitablereceiving medium, and especially onto a sensitized plate or film whichmay be developed afterward.

My present invention is in the nature of an improvement upon theinventions shown, described, and claimed in my prior-applications filedMay 7, 1898, Serial No. 680,079, and filed July 11,1898, Serial No.685,585, in each of which there is illustrated a machine adapted forcomposing 1nechanically-photoprinted matter suitable for the productionof printed impressions in a manner analogous to mechanical compositionby type-writing, linotyping, and similar methods. In the mechanismillustrated in such prior applications objects may be successively orselectively brought to a working position and images thereof projectedsuccessively or selectively onto a receiving or sensitized medium insuch a manner as to produce either a transitory image on a screen orother non-recording medium or a permanent record upon a sensitized plateor film, and the operation of the mechanism controls the location ofeach selected object in working position to the exclusion of all theother objects. These objects or characters will usually be the letters,numbers, or other devices common to typography and will be representedby negatives through or around which light may pass to project upon thesensitized surface of the image-recording medium the images of suchobjects, either singly as they may be selected and brought to workingposition or in groups of any desired number. These objects or charactersmay be supported in any suitable manner and brought one at a time intoworking position, when light will be permitted to pass through or aroundeach positioned character to project an image onto the sensitizedmedium, which latter will usually be shifted step by step after eachprojection of an image, a suitable light controller or shutter beingoperated to permit a ray of light to shine through a character ornegative each time that such character is positioned. All of these partswill usually be controlled by keys on a suitable keyboard, and hence bythe manipulation of these keys in substantially the same manner as thatin which an ordinary type-writer is operated the matter to bephotoprinted on the sensitized plate may be set up or composed letter byletter, and hence word by word, by the striking of the selected keys andthe characters photoprinted one by one or group by group in proper orderand spaced in such a manner as may be determined by the operation of themechanism for shifting one or more of the main three cooperativepartsviz., the negative, the sensitized medium, and a suitableimage-governing light-controllerrelatively to the other or others topermit the photo printing of successive characters at successive pointson the sensitized medium.

The machine forming the subject-matter of this invention is intended toeffect the same results as those described in my prior applications, butdiffers from the former machines in many features of construction. Iprefer, however, to retain one of the features shown in both of saidapplicationsviz., the employment of double-case objects orcarricrsadapted to cooperate selectively with the image-receiving mediumor plate to print an upper-case or a lower-case character, as may bedesired and as will be determined by the operation of suitable shiftingmeans controlling the case positions. As in my secondhereinbefore-mentioned application, the several image-forming objects orcharacters are preferably mounted upon independentlymovable carriers,which in this case may be swinging frames oscillatory about a commonaxis, the various frames carrying the objects being substantiallynested.

It is essential, of course, that the objector negative to be printedshould be located at an exact predetermined point, and some means shouldbe employed for positively loeating each object in such workingposition. I prefer in this case to employ for tl s purpose blockingmeans which will block the return of the object prematurely and may thuslock said object for a predetermined interval in its image-projectingposition. The blocking means may be of any suitable type and maybecontrolled in anyproper manner; but I prefer that it shall bepower-operated and controlled by the keys corresponding to the objectsor characters used in the machine.

One of the principal features of my present improvements is theemployment as a part of an image-forming mechanism of power-operatedmeans controlling the operation of one or more of the principal devicesor subordinate mechanisms of themain mechanism, and preferably thesesubmechanisms will not only be power-operated, but key-controlled, thekeys governing them usually being those by which the selection of theobjects or characters is determined. Hence it will be apparent thatwhile in the machine shown in my prior applications the proper operationof the severalsubmechanisms or devices, which are the principal factorsin determining the projection and printing of objects or charactersselected by the keys, is effected directly by the manipulation of thosekeys, in the present case it is only necessary for the operator toemploy sufficient force to manipulate or depress the keys and that thereal work of operating devices or submechanisms of con siderable sizeand Weight may be performed by power-operated means controlled whollyby, and therefore dependent upon, the opera tion of successive membersor keys of the ob ject-selecting means. The power-operated means which Iprefer to employ will usually be a continnonsly-rotative membercooperative with an intermittently-rotative driven member in such amanner thatwhile the latter will usually be held under restraintitwillbe instantly rotated, preferably at a high rate of speed, by the drivingmember when released by the controlling means or devices governed by theselecting mechanism or keys. It will be seen, therefore, that on eachoperation of a key the intermittently rotative driven member should bereleased from restraint and permitted to be tn rned by the continuously-rotative driving member, and when so released and turned it isdesirable that it should then be stopped in its original position.During this single complete rotation the submechanisms or devicescontrolled thereby should be actuated by powerderived from the rotationthereof and not directly by the movement of the key-operated selectingmeans, and it will be evident that several )ower-operated devices orsnbmechanisms may be thus actuated in proper timing, the order in whichtheir movements take place being capable of exact determination by thepositions of the parts which are carried by or cooperate with theintermittently-rotative driven member. One of the principalsubmechanisms or devices which I prefer to operate in this way is alight-controller or lightcontrolling medium, usually a shutter, by meansof *hich light is ordinarily turned on to permit it to shine through oraround an object when the latter is positioned, and it will be seen thatwhen such light-controller is power-operated the time during which itpermits the light to be turned onthat is, the length of the exposuremaybe determined accurately by such power-operated means as, for example,by the employment on the intermittently-rotative driven member of acamhavingaworking face the predetermined length of which governs thelength of such exposure.

The principal sub mechanisms or devices controlling the projection ofthe images, or some of them, will preferably be mounted in such a manneras to be shiftable between dil ferent case positions, and I deem itdesirable to shift the continuously-rotative driving member in a similarmanner. For this reason whileditferent forms of driving moans might beemployed in order to obtain the greatest freedom or independence ofaction I have illustrated herein an electric motor supported onashiftable frame or carriage carrying in proper bearings an armatureshaftconstituting this rotary driving member, it being apparent that byproviding wires of proper length the necessary provision will be madefor permitting this shifting movement of the motor to the different casepositions.

WVhen the submechanisms controlled by the keys are operated by power inthe manner just described, it is expedient to provide suitable blockingmeans, as before mentioned, for the purpose of preventing impropermanipulation of the keys-that is,'iingeri1ig of the keys at too high arate of speed for the parts controlled by the intermittently-rotativedriven member to operate properly. It is of course necessary after eachobject-selecting key is depressed that a complete cycle of operationsshall follow before another key can become effective to permit thecommencement of another such cycle. Hence when the keys control theintermittently-rotative member directly suitable key-blocking meansshould be employed, even though the continuously-rotative member beoperated at an exceptionally high rate of speed.

hese features of my present invention and others not hereinbeforedescribed in detail, but which will be set forth fully hereinafter, areshown in the drawings accompanying and forming part of thisspecification, in which Figure l is a plan of an image-forming orphotoprinting mechanism embodying my present improvements, parts beingbroken away in order to illustrate the construction clearly.- Fig. 2 isan enlarged rear elevation of the same. Fig. 3 is an enlarged transversesection of the same, the section being taken in line 3 3, Fig. 5. Fig.iis a front elevation of the same. Fig. 5 is a longitudinal section ofthe same, the section being taken in line 5 5, Fig. 1. Figs. 0 and Tarelongitudinal sectional elevations of a portion of the mechanism andillustrate the positions of various parts at different stages in theoperation. Fig. 8 is an enlarged elevation of a detail, illustrating themanner in which the swinging object-carrying frames are pivoted andnested. Fig. 9 is a sectional side elevation of a portion of the same,and Figs. 10 and 11 are respectively a side elevation and a front viewillustrating in detail the escapement feed mechanism which I prefer toemploy.

Similar characters of reference designate corresponding parts in thedifferent figures of the drawings.

As heretofore stated, my present improvements may be embodied in anysuitable mechanism in which image-forming objects or negatives may bebrought to a working position by object-selecting means and theprojection of the images of these objects permitted by a properlight-controller. then the invention is embodied in aphotoprintingmechanism, I may employ also, in connection with theseparts, suitable feeding mechanism for a plate or plate-holder, and,moreover, the objects or characters maybe advantageously double-caseones. Such a mechanism should also have line-spacing mechanism forshifting the image-receiving medium or plate after a line is finished.

As in the machines illustrated in my prior applications hereinbeforementioned, the operation of the several submechanisms or devices dependsonly upon the striking of the usual keys. Here each object the image ofwhich is to be projected or photoprinted is controlled bya single key;but only one negative or object is brought to working position at anygiven time, such selected object being shifted out of the way beforeanother is brought into position to be photoprinted. As to this featureof myinvention the operation of the object-locating mechanism issubstantially the same as that of the type-locating mechanism of anordinary type-writing machine, in which the types are broughtselectively and successively to a common printing-point byindependently-movable typearms, the objects or negatives in this casebeing brought in asimilar mannerselectively and successively to a commonlocus in the path of the ray or beam of light by which the printing ofthe selected character is to be effected. In this case substantially allof the working parts of the mechanism may be mounted within and inclosedby some suitable casing, such as O, which, it should be understood, willordinarilybe attached to the wall or some other suitable part of a darkroom, the rear end of the machine being open in the presentconstruction.

The objects or characters will usually be mounted onindependently-movable carriers or frames, each of which carriers orframes is designated in a general way by 0. These carriers arepreferably substantially U shaped frames supported approximately inhorizontal planes when in their normal positions and adapted whenoperated to drop to a vertical position to locate an object carriedthereby at the desired working point. Here these frames are of dilferentsizes and are supported to swing about different centers, and all are sosupported as to operate to bring the objects carried thereby intoworking position in a common locus. The organization of these frames issuch that they lie one within the other and present a nested appearance.The manner in which the mounting of the frames is effected is clearlyillus trated in Figs. 3, 8, and 9, from which it will be seen that eachframe has two pivots or bearings at opposite sides of the machine andthat these bearings are so positioned relatively to one another as to bedisposed in step formation, one above another. The pivots or bearingsfor these frames may be screws, such as 2, supported by curved arms orbrackets, such as 3, extending out from a bar or plate, such as 3,suitably secured to the frame of the machine. These brackets 3 projectfar enough to permit rearward extensions of the frames 0 to beoperatively connected with keys of the keyboard and work freely betweentheir pivots and an adjacent supporting member or wall of the framework.This wall, which is indicated by 5", forms part of the fixed framing ofthe mechanism. Each of the screws 2 is adjustable to tighten or loosenthe swinging frames, and the interval between adjacent bracket-arms 8'issuch as to permit said arms to swing freely and yet provide for properside guiding of the same. The upper edges of successive brackets may becut away, as indicated at 3, in order to permit the screws to be placedin position and properly adjusted, as will be clear by referring toFigs. 8 and 9.

Each of the frames 0 is intended to carrya pair of objects or charactersin the form of negatives substantially similar to those described in myprior application, hereinbefore referred tothat is to say, each framewill usually have two negatives, an upper-case one, such as o, and alower-case one, such as 0, either of which may be brought to a workingposition at will, each negative being preferably an object having anopaque body or background and a translucent or transparent design,character, or letter thereon, through which light may pass to projectthe image of such design, character, or letter onto a receiving orphotoprinting medium. As each double-case character is supported at thecenter of a substantially rigid frame having two widely-separated pivotsor bearing-points, and as each frame is side-guided as to its arms, itwill be seen that the frames are directly positioned as the character orobject is brought to the working position, thus guarding effec tuallyagainst misalinement of a character at the printing moment.

By means of suitable connections between a proper keyboard and theseveral frames 0 the latter may be swung selectively toward the workingpoint independently of one another. The actuating connections may be ofany suitable type, but in all cases will be controlledmostadvantageously by means of keylevers, such as 5, substantially ofthe type employed in writing-machines. Said key-le vers may be supportedin any suitable mauneras, for example, on a rod 58 near the center ofthe machine and between the ends of the key-leversand may be heldnormally in their raised positions by means of springs, such as 59,seated in bores in a plate (30 suitably supported near the forward sideof the framework.

The actuating connections between the keylevers and the carriers orframes 0 may be of any suitable type, but are preferably shortadjustable links, such as (31, connected at their lower ends to the rearshort arms of the frames 0 and at their upper ends to the keylevers atpoints adjacent to the rear en ds of the latter.

The movements of the key-levers 5 may be transmitted to a universal bar,such as U, supported at the ends of rockarms pivoted on a suitablesupport, such as the rod 58. llerel have shown two short rock-ar ms 50and a long arm 50, extending rearwardly from said rod 58, the universalbar U being supported by all of these arms. At its rear end the long arm50 may cooperate with means for con trolling the operation of thepower-operated mechanism, as hereinbefore stated.

in the present case l have illustrated at D a shiftable carriage orframe, which is intended to reciprocate between two different casepositions, and hence will have but a slight range of movement. Thiscarriage may be constructed and mounted in any suitable way; but in thepresent case embodies as its principal feature a substantially flat bedor base, such as 29, having at its opposite sides grooves, such as 29,into which fit ribs, such as 28, at opposite sides of the frame,suitable steps, such as 28, being disposed at the forward ends of theseribs, while at the rear end of the frame its movement in that directionmay be limited by adjustable stops, as 20, carried by brackets, such as20, projecting from the framework, suitable springs,such as 2l',coiledaround pins 21, projecting forwardly from the brackets 20, serving tomaintain the frame D normally in the position shown in Fig. 5. For thepurpose of shifting this frame to the opposite position from that shownin Fig. 5 I prefer to provide a pair of rigid arms or uprights, such as20, rising from the base 29 at opposite sides thereof and in position tobe operated by suitable connections from keys of the keyboard toreciprocate said shiftable carriage D. The key-levers by means of whichthis shifting movement may be effected are indicated herein by 65, twoconnected levers being shown for the purpose, and it will be seen thatthese are keyed to the rod or shaft 58, and when operated serve tooscillate said shaft in its bearings at opposite sides of the framework,and hence correspondingly oscillate depending rock-arms 58, secured tothe shaft 58 and in position to engage the risers 20 and shift thelatter and therewith said frame D.

Although, of course, a single'case key-op crated mechanism couldbecmployed advantageously in connection with the independently-movablecarriers or frames, 1 t eem it desir-able to make use of a double-casemechanism, as before stated, and by means of the shiftable frame D, justdescribed, one or more of the submechanisms or devices cooperative withthe objects or characters may be shifted relatively to a positionedobject to control the projection of an image from either the upper orthe lower case character of the object. Here I prefer to shift both thelight-controller and the holder for the image-receiving medium, as wellas certain other devices to be hereinafter mentioned.

Light may be directed upon the object or character from any suitablesource by any suitable means-as, for example, through a tube T,connected with a funnel-shaped tube 25, which in turn connected withmovable funnel-shaped tube '6 in the construction illustrated. Alight-deflector, such as r, (see Fig. 3,) may be employed at thejunction of the tubes T and t. The lower end of the tube 25 is of smalldiameter, and is positioned adjacent to the point where the objects arebrought selectively to the working position, and the opening at thelower end of this tube corresponds approximately to the area of thereceiving medium to be uncovered at a single exposure. In the presentcase it is intended that the tube 6 shall be shiftable also from onecase position to another in order to bring the end thereof oppositeeither the upper-caseor lowercase characters on the carriers c, andhence the funnel-shaped tube 6 may be connected to the tube in such amanner as to be capable of swinging relatively thereto, it being evidentthat owing to the relatively great length of the tube A only a smallamount of movement of the latter will be necessary at the point ofconnection with the tube '6. This connection may be made in any suitablemanner, and will preferably be substantially in the plane of the upperside of the casing C in order to permit disconnection of the outsidetubes from the main mechanism.

From the foregoing description it will be seen that the objects and theshiftable car riage controlling the two case positions of the objectsare operated directly by the keys of the keyboard; but certain otherdevices or sub mechanisms, which will be preferably mounted on theshiftable carriage l), maybe poweroperated, though controlled bythekeys, and, moreover, the power by which. these parts are actuated may bederived from a power appa ratus or motor mounted directly on said shiftable carriage. in the construction shown I have illustrated an electricmotor, which is IlO designated in a general way by M and may be of anyordinary type, the armature-shaft of this motor being supported insuitable bearings on the base or bed 29 of the carriage D and the wiresleading to the motor being loosely connected in a circuit from somesuitable source of energy. In this case the ar mature-shaft 7 Oconstitutes a continuouslyrotative driving member, from which move mentmay be imparted to one or more of the submechanisms or devices of themachine, and this shaft should rotate at a somewhat high rate of speedin order that the keys of the keyboard maybe fingered rapidly. I preferto transmit the movements of this armature-shaft in the first instanceto a driven member, which will be intermittently coupled thereto, andthis intermittently rotative driven member is designated in a generalway by 71. Said driven member may be of any suitable type, but willusually be a sleeve loosely mounted on the shaft 70, but so organizedtherewith as to be rotated thereby when not held under restraint by someother member. In orderto obtain this result, some suitable couplingmeans should be employed between the rotary driving and driven members,and this connection will be a frictional one, as indicated by thefriction-disks shown at 72. Obviously now unless the sleeve 71 ispositively held it will be rotated by the shaft 70, and while suchsleeve is intended to be held normally, so as to arrest its movement,yet it will be seen thatits rotation will begin instantaneously when itis free from restraint.

For the purpose of normally preventing rotation of the sleeve 71 I mayemploy in connection therewith an arresting device or stop controlled bythe keys of the keyboard, and in the construction illustrated I haveshown two such arresting devices or stops, both of which are governed bythe long rock-arm 50, connected to the universal bar U. One of thesearresting devices embodies a swinging stop-segment controlled directlyby the arm 50 and adapted to engage one stop carried by the sleeve 71,while the other arresting device embodies a pawl suitablysupported andnormally held in engagement with a second stop or tooth carried by saidsleeve. In the construction shown a link 73 is connected to the rear endof the arm 50, and at its lower end said link is pivoted to one end of arockarm 74-, secured to a short rockshaft 74, journaled in a bearing ina standard 75, rising from the base 29 of the carriage D, said shaftalso having secured thereto a stop-segment 74", having an L-shaped stoprim or flange 74!. Ihis stop-rim normally is in contact with a stop,such as a pin 76, carried by a disk 76, fixed on the sleeve 71, and thisdisk also has a stop-tooth 76", adapted to be engaged by a pawl 77,secured to a short shaft journaled in a bearing in another upright 78,rising from the base 29, a pawl-releasing arm 77 being secured to saidshaft for movement in unison with the pawl. A spring, such as 79, may beemployed for returning the stop segment 74; and the universal bar U totheir normal positions on the release of an operated key. The shaft 74may also have secured thereto a rock-arm 80, carrying a bypass devicecooperating with the pawl-reload ing rock-arm 77 and serving to releasethe pawl '77 from the tooth 70 when acharacterkey is depressed, it beingevident that both the segment 74: and the pawl 77 will release the disk76, and hence the sleeve 71, substantially simultaneously to permitinstant rotation of the latter. The manner in which these parts areoperated when released by the depression of a key-lever will be apparentby referring to Figs. 0 and 7.

IVhenever by the depression of a character-- key, as just described, therotary driven member is permitted to rotate, its movement should ofcourse be transmitted to a suitablyoperated device or devices, and inthis case both the image-governing light'controller or shutter andblocking means for the key-levers, the objects, and the light-controllerare intended to be actuated by this intermittentlyrotative sleeve. Forthis reason the rotary driven member may carry one or more cams, therebeing preferably in this case two cams 71, which are intended tocooperate with the blocking means controlling the key-levers directly,and a cam 71", cooperative with suitable means for actuating thelight-controller, which means may also serve to time the exposure orperiod during which the photoprinting plate is subjected to the actionof the light-rays and also, as a result of such timing, to prevent thepremature return of said light'controller to its normal or light-exeluding position. In the construction illustrated a standard 82, risingfrom the base 25) of the shiftable carriage D, supports by a properbearing at the upper end thereof a rock-shaft having a depending arm orhanger 83, pivotally connected at its lower end to a light-controller orshutter, such as S, which may be mounted for horizontal reciprocation ina guide 84, carried by the frame or carriage D, it being apparent thatby reason of the mounting of the light-controller on said carriage theshutter also will be reciprocative between the two case positions.

In order to provide for the case movement of the light-directing tube25, the latter may be connected directly to the carriage D, as by meansof a link 85. (See Figs. 6 and 7.) One of the movements of the hanger 83is derived from the cam 71, said hanger having thereon in this instancean antifriction-roller 83, co acting with the periphery of said cam. Theother movement of said hanger may be obtained from a spring, such as 86.

The blocking means which I prefer to employ for controlling thekey-levers directly may embody two main parts, one of which in this casewill be an intermittently-rotative member carried by the sleeve 71,while the other will be a rcciprocatory or oscillatory device coactingdirectly with the key-levers. Here the rotary member or members may bethe two cams 71 hereinbefore mentioned, while the reciprocatory devicemay be a swinging frame embodying a pair of oscillatory arms 87, pivotedon the base 29 of the carriage D and supporting at their upper ends ablocking-bar 88, said arms 87 preferably having antifriction-rollers 87in engagement with the cams 71, a spring, such as 89, being employed inthis case to return such reciprocatory frame. The blocking-bar 88 is sopositioned in this instance as to work in a path between an operated ordepressed lever and the unoperated ones, and it embodies a plurality ofblocking members or blocking fingers, such as 88, one for each of thecharacter-keys on the keyboard. In the construction shown these fingerscooperate with latorally-projecting pins 5 of the key-levers 5 and areof sufficient length to coact with said pins whether the bar is in itsupper-case or its lower-case position to either of which it will ofcourse be shifted in accordance with the movements of the carriage D. Itwill be noticed that when any character-key is depressed thecorresponding key-lever (see Fig. 7) is raised at its rear end and aspace is left between the pin 5 of the operated lever and thecorresponding pins of the unoperated keylevers of sufficient width topermit the blocking-bar to be moved into a blocking position betweenthem, and thus simultaneously block the return of the operated key-leverand the actuation of the unoperated ones. Of course after a key is sodepressed while actuation of the blocking-frame will not take placeuntil after the release of the intermittently-rotative driven member orsleeve, yet the camfaces of the cams 71 should be so positioned as tooperate said frame substantially instantaneously on the starting of suchintermittent rotary movement. I

While the feed mechanism, by means of which a stepby-st-ep feed movementis obtained for permitting the characters to print successively onsuccessive portions of a sensitized receiving medium, may be of anysuitable construction, and while I may impart such movement to anyproper one of the several enacting elements of the photoprintingmechanism, yet in the preferred construction it is desirable to shiftthe image-receiving or photoprinting medium step by step on thedepression of the character-keys, and I deem it advantageous to make useof a step-by-step escapement-feed mechanism which in the embodimentshown is of novel construction. This feed mechanism will be operated tothe best advantage from a universal bar-such, for example, as that shownat Usaid bar being carried in this instance by rock-arms 40, mounted onthe shaft 58, said bar being connected by means of a rod 90 to arock-arm 91, carried by a rock-shaft 91, journaled in bearings, one inthe forward side of the casing and the other in an upright 92, risingfrom the lower side of said casing. This rockshaft .Jl is intended inthe present case to carry a pair of dogs or pawls, which may be ofwell-known construction and will form part of the escapement deviceproper, these dogs being designated herein in a general way by 26 andone being fixed to the rock-shaft and the other preferably movablerelatively to the fixed dog. Obviously as the several character-keys arestruck selectively one after another the dogs will be correspondinglyoscillated to permit the other member of the escapeinentfeed mechanismto be advanced step by step. In this case the dogs cooperate with aratchet-wheel, such as 25, which may be splined on a shaft 93, journaledin bearings at the opposite sides of the framework, said ratchet-wheelpreferably having a long hub 25 with a grooved collar 25, in the grooveof which may work the pin of a shipping arm or lever 9% of well-knownconstruction, carried by a shaft 94-, having at the forward end thereofa handle 9%, by means of which the shipping-arm 9-1 may be turned toshift the ratchet-wheel along the shaft ()3 into and out of operativerelation with the dogs 20'. From this shaft ()3 connection may be madein any suitable manner to a traveling carriage or slide, such as thatdesignated herein in a general way by D, on which carriage a holder fora plate, film, or other image-receiving medium is supported for movementrelatively to the carriage and is designated in a general way by H. Thiscarriage and also the plate-holder may be supported in substantially thesame manner as in my prior applications hereinbefore referred tothat isto say, the carriage may be supported for horizontal movement on a pairof horizontal guide-rods, such as 18 and 19, carried by and forming partof the shiftable carriage D, while the plate-holder may be guided in adirection transverse to the direction of movement of the travelingcarriage by a pair of guide-rods, such as 22 and 23, forming part ofsaid carriage D, and hence supported by the rods 18 and 19.

In the machine shown in the drawings the direction of movement of thecarriage Dis from the front to the rear of the machine, and in Fig. 5the manner in which this feed movement is obtained is shown clearly.Here the traveling carriage may be normally under tension from anysuitable source of power, which in this case will include a coiledspring and a driving-band of the usual type, (indicated in a general wayby d.) The carriage D is connected to the driving-band between the endsof the latter, and one end of said band is connected to and may be woundon a reel or spool, such as 95, secured to the shaft 93 andsubstantially similar to that forming part of the driving device ormotor d. The shaft 03 may have on one end thereof a crank or handle,such as 93, for winding up the band, returning the carriage to itsnormal po sition at the beginning of aline, and thereby juttin thecarria e under tension. b b

esaoes p As the several character-keys are struck it will be apparentthat the carriage D will be fed step by step from the front to the rearof the machine until it reaches a predetermined point, usually, ofcourse, at the end of a full line, when suitable line-spacing mechanismmay be operated to bring an unexposed transverse portion of the plateinto position.

In connection with the devices hereinbefore described for feeding thetraveling carriage D, and hence the plate-holder II, step by step forphotoprinting the characters of different words I make use of suitablemeans for spacing between words and also between thelines of the matterto be photoprinted. For spacing between the words I may use the ordinaryform of space-bar or space-key, such as the key-lever shown at 100, andthis may operate the universal bar U directly, and hence only thoseparts of the mechanism controlled by said bar, it being only necessaryto operate the feed mechanism therefrom. The linespacing mechanism willpreferably be 0011- trolled by means separate from and independent ofthe character-keys, as is the case-key. In the present case aline-spacinglever, such as 105, is located at the under side oftheforward end of the machine and carries a pawl 105, cooperating with aratchet-wheel secured to a long shaft 106, journaled in bearings at thefront and rear of the machine, a suitable holding-pawl, such as 107,being employed to prevent return movement of the ratchet-wheel. Theratchet-wheel is not permanently secured to the shaft 106, however, butis in this case clamped thereto by means of a milled adjustingmut 108,and when said nut is loosened it and the operating-lever and the pawl105 will be disconnected from said shaft to permit the latter to beturned freely for returning the plate-holder H to the right-hand side ofthe machine when a plate has been com pletely photoprinted. The shaft100 carries thereon suitable means for transferring its movements to theplate-holder H, and in this case the means employed forthis purpose willbe a small gear wheel or pinion, such as 30, having at the sides of theteeth annular flanges 30, between which will be guided a rack, such as32, fixed on the under side of the plate holder II. (See Fig. 5.) Thispinion 30 should in this case be splined on the shaft 106 in order toprovide for the shifting movement of the plate-holder II, the travelingcarriage D, and the shiftable carriage D between the two case positions,it being apparent that said pinion will also be shiftable for the samereason. When thelever 105 is operated, the shaft 106 will be partiallyrotated and the rack 32, and hence the holder H, advanced to bring a newprintingline into working position. The feed movement of this rack andthe plate-holder is from the right to the left of the machine, as seenin Fig. 3.

The manner in which the image-receiving medium, which when the mechanismis used as a photoprinting-machine may be a plate, film, or similararticle, is supported is immaterial; but in the construction shown asensitized photoprinting-plate, such as p, is supported in a dovetailedchannel in the upper face of the plate-holder II and is securely heldtherein. In Fig. 3 l have also indicated the manner in which thepreferred objects or negatives used with my photoprinting mechanism areconstructed. Here the upper-case object o and the lower-case object 0are both represented by disks having opaque surfaces except at thoseportions which contain the characters to be projected or printed on thesensitized surface of the image-receiving medium. The light directedthrough the tube 25 is intended to shine through only that part of thedisk or object covered by the character or letter, and no light willpass through the opaque portion of such object or negative. Hence anexact and perfect image of each character or device selected by theoperator will be projected upon the receiving medium and photoprinted onthe latter, if such medium is a sensitized surface, from all other areasof which light is excluded, as should be the case. The objects ornegatives may be held in place in any suitable manner, prefer ably bycement, and may be of any proper material such as glass, each having adeveloped film or negative of collodion or other sensitized substancethereon, the opaque portion of which represents the exposed portionofthe film and the character the unexposed portion.

The operation of the photoprinting-machine shown herein will be clearlyunderstood from the foregoing description, and it will onlybe necessaryat this time to set forth in a general way the successive steps of theoperation.

It being understood that a plate has been properly positioned in theplate-holder and that current has been turned on to the motor M, thecharacter-keys will be struck one after another by the operator, in thesame manner as are the keys of a type-writing machine, to form words orother combinations of devices from successively-selected characters, thedepression of a character-key causing the oscillation of thecorresponding frame 0 to the proper point for bringing the charactercontrolled by such key into working position. The actuation of thischaracter-key causes the lifting of the universal bar U, and hence ofthe long arm 50, connected to the two releasing devices controlling theintermittently rotative driven member or sleeve 71, and as soon as thesegment 7st" has been shifted from the position shown in Fig. (5 to thatindicated in Fig. 7 and is clear of the stop 76, and as soon as the pawl77 has been raised clear of the tooth '76 by the raising of the arm 77by the by-pass device 81, the driven member or sleeve '71 thus releasedfrom restraint will be rotated instantaneously by the driving member orarmature-shaft 70. Immediately after the driven member starts rotatingthe cams escapee 71 thereon shift the blocking device proper and carrythe blocking-bar 88 into its blocking posit-ion below the rearend of theoperated key-lever and above the corresponding ends of all theunoperated levers, the lingers 8S engaging the pins 5 on the key-leversto prevent the actuation of another key until the completion of thecycle of movements just begun. Shortly after the actuation of theblocking devices, as just described, the cam 71 oscillates the hanger 88and shifts the light-controller or shutter S into position to expose aportion of the sensitized surface of the plate 1) to the action of thelight-beam projected through the tube 25. The length of time duringwhich the exposure will continue will of course depend upon the rate ofrotation of the driven member 71 or the length of the cam-face 71, orboth, and hence if the sleeve 71 is driven at a given rate of speed thetime of exposure may be determined by properly proportioning the lengthof this cam-face. On the completion of the exposure the hanger 83 willbe released by the cam 71", and the shutter S may be returned to itsnormal position by the spring 86. Thereafter at the proper moment, asdetermined by the relative positions of the cam-faces 71 and 71, saidcams 71 will release the blocking device, and the latter, with itsblocking-bar 88, will be withdrawn by the spring 89 clear of allthe-key-levers controlling the characters. As soon as thepreviously-operated key-lever has been released from its blocking-fingeron the blocking-bar 88 the segment 7t will be returned to its normalposition by the spring 79, and with it of course the universal bar U andthe arm 50. At the same time the bypass device 81, which had previouslypassed by the arm 7 7 of the pawl and had thus permitted the pawl 77 todrop back and rest on the face of the disk 76, will again pass by thearm 77 and descend below the latter into position to raise saidlast-mentioned arms again on the depression of another character-key. atthe end of one complete rotation of the disk 76 the tooth 76 thereofwill strike the pawl 77, and at the same time the stop 76 will strikethe stop-flange 7t on the segment 7%, and the movement of the sleevewill thus be arrested. On the rising of the universal bar U, which barwas depressed by the operated key-lever at the same time that theuniversal bar U was raised, the feed-dogs are oscillated, as indicatedin Fig. 11, and thereupon the carriage D, together with the holder andthe plate, is fed toward the rear of the machine a distance representedby one teeth of the ratchet-wheel 25. Of course if the character struckshould be an upper-case one the upper-case key or bar would be depressedand held down until the completion of the printing. This depression ofthe upper-case key would necessarily result in the shifting of thecarriage D toward the rear end of the machine, and with it the tube t,the shutter S, the motor M, the blocking, the arresting, and thereleasing devices mounted on the shiftable carriage D, the travelingcarriage D, the plate-holder H, and the pin 30, all of which will ofcourse be returned to their normal positions by the springs El on the release of said uppercase key. As soon as a word or other combination ofcharacters has been completed the space-key will be struck in the usualmanner to feed the carriage D a step independently of the operation ofthe character-keys and no shifting of a frame 0 and no operation of theparts mounted on the shiftable carriage l) and which are controlled bythe charactenkeys will take place at this time. On the completion of aline of printed matter on a plate the line-spacing lever will beoperated, and the plate-holder will be shifted thereby longitudinally tobring another transverse portion of the plate to the printing-line.After all of the surface of the plate 2) has been 1i)hotoprinted the nut108 may be released to free the line-spacing mechanism from the shaft106, whereupon the plate-holder ll may be drawn back to the right-handside of the machine, as seen in Fig. i into the open space at the rearofthe machine, where the finished plate may be removed and a new plateslipped into the dovetailed guide of the holder.

A machine constructed in accordance with my present improvements, ashereinbefore described, is not only capable of projecting the images ofobjects of different sorts, but also when used in connection with asensitized ii'nage-receiving medium is capable of operation for settingup selectively the characters which compose typographic matter eitherfor newspaper or book work, and the plate or film on which'the matter isset up constitutes,when properly developed by the ordinary methods, aperfect substitute for the plates usually printed by the indirectprocesses.

Having described my invention, I claim- 1. inakey-controlledimageformingmechanism embodying a plurality of devicescooperative for producing the desired result, at least one of whichdevices is power-ogerated, the combination, with an image-governinglight-controller and with an image-receiving medium, of imageformingobjects locatable in working position between the light-corn troller andthe image-receiving medium, and object-selecting means.

2. Inakey-controlledimage-formingmechanism eml'iodying a plurality ofdevices cooperative for producing the desired result, at least one ofwhich devices is power-operated, the combination, with animage-governing light-controller and with an image-receiving medium, ofimage-forming objects each constructed to permit the passage of lightfor projecting an object-delineating image, and object-selecting means.

In a key-controlled imageforming mechanism, the combination, with apower-operated image-governing light-controllcr and with animage-receiving medium, of imageforming objects locatable in workingposition between the light-controller and the image-receiving medium,and object-selecting means.

4. In a key-controlled image-forming mechanism, the combination, with akey-controlled power-operated image governing light-controller and withan image-receiving medium, of image-forming objects locatable in workingposition between the light-controller and the image-receiving medium,and object-selecting means.

5. In a key-controlled image-forming mechanism, the combination, with apower-operated image-governing light-controller and with animage-receiving medium, of imageforming objects locatable in workingposition between the light-controller and the imagereceiving medium,andobject-selecting means governing the operation of the light controller.

6. In an image-forming mechanism, the combination, with animage-governing lightcontrolling medium and with an image-receivingmedium, of key-controlled objects 10- catable in working positionbetween the lightcontrolling and image-receiving media, andpower-operated means for shifting one of said media relatively to theother after each projection of an image.

7. In a key-controlled imageforming mechanism embodying a plurality ofdevices 00- operative for producing the desired result, at least one ofwhich devices is poweroperated, the combination, with an image-governinglight-controller and with a holder for a sensitized image-receivingmedium,ofimage-forming objects locatable in working position between thelight-controller and the image-receiving medium, and object-selectingmeans.

8. In a key-controlled image-forming mechanism, the combination, with areciprocatory power-operated imagegoverning light-controller and with animage-receiving medium, of image-forming objects locatable in workingposition between the light-controller and the image-receiving medium,and object-selecting means. I,

9. In a key-controlled im age-forming mechanism embodying a plurality ofdevices cooperative for producing the desired result, at least one ofwhich devices is power-operated, the combination, with an image-formingobject locatable in working position between the light-controller andthe imagereceiving medium, of an image-governing light-controller; animage-receiving medium shiftable in different directions; andindependentlyoperable controlling devices governing, respectively, saidmovements of the image-receiving media.

10. In an image-forming mechanism, the combination, with apower-operated imagegoverning light-controller and with animagereceiving medium, of image-forming objects locatable in workingposition between the 1ight-con troller and the imagereceiving medium,and object-locating means for shifting said objects one at a time to theworking position.

11. In an image-forming mechanism, the combination, with animage-governing lightcontroller and with an image-receiving medium, ofimage-forming objects locatable in working position between thelight-controller and the image-receiving medium; object-1ocating meansfor shifting said objects one at a time to a working position; andpower-operated means for actuating said light-controller after eachlocation of an object.

12. In an image-forming mechanism, the combination, with double-caseimage-forming objects locatable in working position between thelight-controller and the image-receiving medium, of an image-receivingmedium; shifting means for shifting one of said elements to either caseposition; and a power operated image-governing light-controller.

13. In an image-forming mechanism, the combination, with double-caseimage-forming objects, of object-selecting means, and a key-controlledpower-operated image-governinglight-controller shiftable to differentcase positions.

14. In an image-forming mechanism, the combination, with double-caseimage-forming objects, of object-selecting means; a power-operatedimage-governing light-controller; a holder for an image-receivingmedium; and key-controlled means for shifting the light-controller andthe holder to different case positions.

15. In a key-controlled mechanism governed in its operation byobject-selecting means, the combination, with image-forming objects eachconstructed to permit the passage of light for projecting anobject-delineating image, of object-selecting means; a shiftablecarriage; and a power-operated device movable in unison with thecarriage.

16. In a key-controlled mechanism governed in its operation byobject-selecting means, the combination, with image-forming objects eachconstructed to permit the passage of light for projecting anobject-delineating image, of object-selecting means; a shiftablecarriage; and a power-operated device supported by said carriage.

17. In a key-controlled mechanism, the combination,with image-formingobjects, and with object-selecting means, of a shiftable carriage; animage-governing light-controller; and a power-operated device supportedby the carriage and governing the operation of the light-controller.

18. In a key-controlled mechanism, the combination,with image 'formingobjects, and with object-selecting means, of a shiftable carriage, andapower-operated image-governinglight-controller supported by thecarriage.

19. In a key-controlled mechanism, the combination, with double-caseimage-forming objects, and with object-selecting means, of a carriage;means for shifting said carriage to different case positions; and apower-operated image-governing light-controller supported by thecarriage and shiftable therewith to different case positions.

20. In a key-controlled mechanism, the combination, with double-caseimage-forming objects, and with object-selecting means, of a carriage;means for shifting said carriage to different case positions; animage-governing light-controller; and a shiftable light-directing tubeconnected to said carriage and shiftable therewith.

21. In a key-controlled mechanism, the combination, With double-caseimage-forming objects, and with object-selecting means, of a carriage;means for shifting said carriage to different case positions; apower-operated image-governing light-controller supported by thecarriage and shiftable therewith to different case positions; and ashiftable lightdirecting tube connected to, and shiftable with, thecarriage.

22. In a key-controlled mechanism, the combination, with double-caseimage-forming objects, and with object-selecting means, of a carriageshiftable between different case positions; an imagegoverninglight-controller supported by said carriage; a light-directing tube; anda traveling carriage on said shiftable carriage.

23. In a key-controlled mechanism, the

combination, With double-case objects, and with object-selecting means,of a carriage; feed mechanism for said carriage and embodying a fixedand a movable dog; and means for shifting said carriage to differentcase positions and for simultaneously shifting the movable dog Withoutshifting the fixed dog. 24. In an image-forming the mechanismcombination,withimage-formingobjects each constructed to permit thepassage of light for projecting an object-delineating image, ofobject-selecting means, and blocking means controlled by theobject-selecting means.

25. In a key controlled image forming mechanism, the combination, Withkey-controlled image-forming objects each constructed to permit thepassage of light for projecting an object-delineating image, ofblocking; means controlled by said keys.

26. In an image-forming mechanism, the combination, with image-formingobjects, of object-selecting means; an image-governing lightcontroller;and blocking means controlled by the object-selecting means.

27. In a key-controlled image-forming mechanism, the combination, withkey-controlled image-forming objects each constructed to permit thepassage of light for projecting an object-delineating image,ofkey-blocking means controlled by said keys.

28. In a key-controlled imageforming mechanism, the combination, withkey-controlled image-forming objects each constructed to permit thepassage of light for projecting an object-delineating image,ofkey-blocking means controlled by said keys, and keyreleasing means.

29. In a key-controlled image-forming mechanism, the combination, withkey-controlled image-forming objects each constructed to permit thepassage of light for projecting an object-delineatingimage, of keyblocking and releasing means controlled by said keys.

30. In a keycontrolled image forming mechanism, the combination, withkey-controlled image-forming objects each constructed to permit thepassage of light for projecting an object-delineating image, of areciprocatory key-controlled blocking device.

31. In a keycontrolled image forming mechanism, the combination, withkGY'COlL trolled image-forming objects each constructed to permit thepassage of light for projecting an object-delineating image, of anoscillatory key-controlled blocking device.

In a key-controlled image forming mechanism, the combination, withkey-controlled image-forming objects each constructed to permit thepassage of light for projccting an object-delineating image, of areciprocatory reactive key-controlled blocking device.

In an image-forming mechanism, the combination ,With image-formingobjects each constructed to permit the passage of light for projectingan object-delineating image, of object-selecting means, andposer-operated blocking means controlled by the object-selecting means.

3i. In an image'forming mechanism, the combinatiomwithimage-formingobjects suitable for the projection of images for photoprinting,ofobject-selecting mcans,and bloeking means controlled by theobject-selecting means and embodying a rotary power-operated member.

In an image-forming mechanism, thecombinatiomwithimage-formingobjeetssuitable for the projection of imagesfor photoprinting, of object-selecting means,and blocking meanscontrolled by the object-selecting means and embodying anintermittently-rotative power-operated member.

so. In an image-forming mechanism, the combi11ation,withimage-formingobjects suitable for the projection of images for photoprinting,ofobject-selecting means, and blocking means controlled by theobject-selecting means and'embodying a rotary power-operated member anda reciprocatory blocking device controlled thereby.

37. In an image-forming mechanism, the combinatiomwithimage-formingobjects suitable for the projection of images for photoprinting, ofobject-selectingmeans, a continuously-rotative driving member; anintermittently rotative driven member; coupling means between saidrotary members and con trolled by the obj ect-selectin g means; and anintermittently-movable operated device controlled by said rotary drivenmember.

38. In an image-forming mechanism, the combination with im age-formingobjects suit able for the projection of images for photoprinting, ofobject-selecting means; acontinuously-rotative driving member; anintermittently rotative driven member; coupling means between saidrotary members and controlled by the object-selecting means; and alight-controller operated by said rotary driven member.

39. In an image-forming mechanism, the combination, with a pair ofkey-coiiitrolled image-forming objects suitable for the projection ofimages for photoprinting, of a pair of key-levers,and key-controlledblocking means shiftable into a blocking position between an operatedand the unoperated key-lever.

40. In an image-forming mechanism, the combinatiomwith key-controlledimage-forming objects suitable for the projection of images forphotoprinting, of a multiplicity of key-levers,and key-controlledblocking means shiftable into a blocking position between an operatedkey-lever and all the unoperated key-levers.

41. In an image-forming mechanism, the combination, with a pair ofkey-controlled image-formin g objects suit-able for the projection ofimages for photoprinting, of a pair of key-levers, and reciprocatorykey-controlled blocking means shiftable into a blocking position betweenan operated and the unoperated key-lever.

42. In an image-forming mechanism, the combination, with a pair ofkey-controlled image-forming objects suitable for the projection ofimages for photoprinting, of a pair of key-levers, and oscillatorykey-controlled blocking means shiftable into a blocking position betweenan operated and the unoperated key-lever.

43. In a key-controlled mechanism,the combination, with a pair ofkey-levers, of key-controlled blocking means, and means for shiftingsaid blocking means between different case positions.

44. In a key controlled image forming mechanism, the combination, withkey-controlled image forming objects, each constructed to permit thepassage of light for projecting an object-delineating image, ofkeycontrolled power-operated blocking means embodying a rotarypower-operated member and a separately-operative' blocking devicecontrolled thereby.

'15. In a key-controlled image-forming mechanism, the combination, withkey-controlled image forming objects, each constructed to permit thepassage of light for projecting an object-delineating image, ofkeycontrolled power-operated blocking means embodying a rotarypower-operated member and a reciprocatory blocking device controlledthereby. I

46. In a key-controlled mechanism,the combin ation, with a pair ofkey-levers,of key-c011- trolled power-operated blocking means embod ying a rotary power-operated member and a separatelyoperative blockingdevice controlled thereby; and means for shifting said blocking devicebetween different case positions.

47. In a key-controlled mechanism,the combination, with a pair ofkey-levers, of asl1iftable carriage; means for shifting said carriagebetween different case positions; and key-controlled blocking meanssupported by. said carriage and shiftable into a blocking positionbetween an operated and the unoperated key-lever.

48. In a key-controlled mechanism,the co1nbination, with a plurality ofkey-levers, of a reciprocatory key controlled blocking bar having aplurality of blocking members shiftable into blocking positions in aplane be tween an operated key-lever and all the unoperated levers.

49. In a key-controlled meehanism,the combination, with a plurality ofkey-levers, of a reciprocatory key controlled blocking bar having aplurality of separated blocking-fingers shiftable into blockingpositions in a plane between an operated key-lever and all theunoperated levers.

50. In an image-forming mechanism, the

combination,with key-controllediinage-forming objects each constructedto permit the passage of light for projecting an object-delineatingimage, of a rotary actuating member having a cam, and a cam-operatedblocking device.

51. In an image-forming mechanism, the COlIlbll1ttlO1l,Wlbllkey-controlled image-forming objects suitable for the projection ofimages for photoprinting, of a rotary actuating member having a cam, anda cam-operated image-governing light-controller.

52. In an image-forming mechanism, the combination, with key-controlledimageforming objects suitable for the projection of images forphotoprinting, of a rotary actuating member having a pair of camsdisposed in different circumferential positions; a blocking devicecontrolled by one of said cams; and an image-governing light-controlleroperated by the other cam.

53. In an image-forming mechanism, the combination,with image-formingobjects suitable for the projection of images for photoprinting, ofobject-selecting means; a continuously-rotative driving member; anintermittently-rotative driven member; coupling means between saidrotary members and controlled by the object-selecting means; anintermittently-movable operated device controlledby said rotary drivenmember; and releasing and arresting means controlled by theobject-selecting means and controlling the movements of the drivenmember.

54. In an image-forming mechanism, the eombinationavith image-formingobjects suitable for the projection of images for photoprinting, ofobject-selecting means; a continuously-rotative driving member; anintermittently-rotative driven member; coupling means between saidrotary members and controlled by the object-selecting means; anintermittently-movable operated device controlled by said rotary drivenmember; and a by-pass releasing device and an arresting device bothcontrolled by the object-selecting means and controlling the movementsof the driven member.

55. In a key-controlled image-forming mechanism, the combination, withimage-forming objects suitable for the projection of images forphotoprinting, of object-selecting means, and poweroperatedobjectlocking means controlled by the object-selecting means.

56. In akey-controlledimage-forming mechanism, the combination, Withimage-forming objects suitable for the projection of images forphotoprinting, of objectselecting means, and power-operated objectlocking and releasing means controlled by the object-selecting means.

57. In a key-controlled image-formin mech anism, the combination, withimage-forming objects suitable for the projection of images forphotoprinting, of object-selecting means; an intermitten tly-rotativemember controlled by the object-selecting means; and objectlocking meanscontrolled bysaid driven member.

58. In a key-controlled image-formin g mechanism, the combination, withimage-forming objects suitable for the projection of images forphotoprinting, of object-selecting means; an image governing lightcontroller; and power-operatedlight-controlleractuating and lockingmeans controlled by the object-selecting means.

50. In a key-controlled im age-forming mechanism, the combination, withimage-forming objects suitable for the projection of images forphotoprinting, of object-selecting means;

and successi vely-elfective power-operated object-locking andlight-controller-aetuating means controlled by the object selectingmeans.

(50. In an image -forming mechanism, the eombinatiomwith key-controlledimage-forming objects suitable for projectingimages for photoprinting,of a rotary actuating member, and a key-controlled device operative bysaid rotary actuating member.

61. In an imagcforming mechanism, the combinatio11,\vitl1key-controlledimage-forming objects suitable for projecting images For photoprinting,of a continuously rotative power-operated actuating membcr,an d akeycontrolled device operative by said rotary actuating member.

62. In an image-forming mechanism, the combination, with key-controlledimage-forming objects suitable for the projection of images forphotoprinting, of a rotary actuating member, and a plurality ofkey-controlled devices operative by said rotary actuating member andhaving different functions.

63. In a key-controlled image-forming meclr anism, the combination, witha pair of key levers, of a pair of image-forming objects controlled,respectively, by said hey-levers and each constructed to permit thepassage of light for projecting an object-delineating image, andkey-controlled power-operated blocking means shiftable into a blockingposition between an operated and the unoperated key-lever.

64-. In a key-controlled image-formi ng mechanism, the combination, witha pair of keylevers, of a pair of image-forming objects controlled,respectively, by said key-levers and each constructed to permit thepassage of light for projecting an object-delineating image; akey-controlled power-operated member; and blocking means controlled bysaid power-operated member and shiftable into a blocking positionbetween an operated and the unoperated key-lever.

FRANCIS ll. RICHARDS.

IVitnesses:

FRED J. DoLn, C. A. WEED.

